Question

Out of 300 people sampled, 243 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids.

Give your answers as decimals, to three places

___________ < p < ____________

Answer 1

We have given,          
          
x=243      
n=300      
Estimate for sample proportion=   0.81
Z critical value(using Z table)=2.58  
Confidence interval formula is  

=(0.752,0.868)  
          
Lower limit for confidence interval=0.752
          
Upper limit for confidence interval=0.868